Crop protection

UK: DCF funds Studentship to tackle Agapanthus pest

The David Colegrave Foundation (DCF) is funding a studentship for undergraduates, as part of the Royal Society of Biology’s (RSB) Plant Health Undergraduate Summer Studentship Programme for 2019. DCF worked with RBS to select one of nine projects put forward by plant scientists that address major plant…

Demonstration trial Gerbera cultivation with Mainspring

"Less water, better results"

A higher water volume does not always give better results, according to a spray technique test on 12 March for Gerbera cultivation in combination with Mainspring - an insecticide for land-based ornamental plants. The result: spraying with less water often gives similar or better results. Gerbera jamesonii Cartwheel Strawberry…

Australia: Pest of the Month - Strawberry tortrix moth

An exotic species, not found in Australia, strawberry tortrix moth is mainly a pest of species from the family Rosaceae and is present in the USA, Canada, Europe and northern Asia, the Mediterranean Basin and South-East Asia. Hosts include strawberry, hawthorn, Malus spp., cinquefoil (Potentilla sp.),…

TerraLink to distribute Regalia Maxx Biofungicide in Western Canada

Marrone Bio Innovations announces distribution partnership in Western Canada

Marrone Bio Innovations has appointed TerraLink as a distributor of the Regalia Maxx Biofungicide in Western Canada. TerraLink has been a supplier of crop input products to…

Kenya: Pest control to boost yields without EU residue risk

Dudutech has announced the launch in Kenya of NEMguard SC to control the country’s most financially damaging crop pest with zero risk of triggering crop rejections by European…

This British orchid is under guard in a secret location

For a few weeks each spring, a lone guard monitors the moors of northern England. This warden pitches a tent in a remote field to watch over a prize so rare that collectors have been known to break laws, trek into deep jungles, and risk capture by guerillas in its pursuit. The object? A single lady’s…

A troublesome leafhopper, and a few (other) thrips

Several years ago a greenhouse grower called to ask about a leafhopper damaging rosemary grown for spring sales. Thanks to help from partners at the Florida Dept. of Agriculture and Consumer Services the culprit was identified as sage leafhopper, Eupteryx melissae. Since then I have had several…

US (MI): Spring is in full swing

Spring is in full swing at the greenhouses in Michigan. Easter lily growers wrapped up moving lilies to coolers or shipping them late last week. Spring bedding plants are coming into full color. After a slow start early in January due to delayed vegetative cuttings or plugs/liners, growers are catching up to their production…

Resistosome illuminates plant disease resistance mechanisms

Like animals, plants possess an immune system to fight off invading parasites. Unlike vertebrates that possess both adaptive immunity and innate immunity, plants solely rely on innate immunity, which deploys immune receptors to detect molecules derived from parasites and activate defenses. Plant innate…

Intumescence on Black-eyed Susan vine

Clusters of green to white or tan wart-like bumps or lesions were recently observed among veins and petioles of black-eyed Susan vine liners. These abnormalities growing on the leaf and petiole surfaces is a physiological disorder, intumescence. by W. Garrett Owen - wgowen@msu.edu During a recent…

US (HI): Experts scramble to figure out what’s killing a popular tropical plant

Frustrated Oahu farmers are pleading for help in their attempt to figure out what’s killing off their ornamental ginger crops. The plants are popular for landscaping and floral displays, and concerned growers have been reaching out to experts at the University of Hawaii for about 5 years as they try to…

Italy: Pilot project to relaunch economy of Xylella-affected area

The ACLI Racale Cooperative, a partner of the POnTE Project, presented the first phase of the Pilot Project “Resilience”, the first technical desk of integrated management in Salento (Apulia, Italy) with the aim of relaunching the rural economy of the area and “reap the benefits” of the production…

US: Thrips, aphids on hanging baskets

Warmer, sunny weather, while generally welcome because of heating reductions and crop development benefits, is bringing on insect populations. Thrips problems continue to be observed in greenhouses. Damaging populations were observed this week on geranium, Vinca vine, peppers and Verbena. Thrips presence…

"Check your roots"

I was recently visiting a greenhouse admiring the health of their begonia plants. The foliage looked healthy and robust. I was sure they would sell quickly at garden centers. Then, as I always do, I pulled a plant from cell pack and looked at the roots. My initial appraisal of the plants' health soon turned. The roots were…

US: Study sheds light on major disease in roses

Agricultural Research Service ( ARS ) scientists in Beltsville, Maryland and their colleagues have discovered why a mite is causing extensive damages to the nation’s $250-million-a-year rose industry and why it’s so hard to detect and control. It seems the mite hides deep in the flower’s internal organs.…

"Keep an eye on substrate pH for iron inefficient crop species"

Popular species such as petunia, calibrachoa, gerbera, snapdragon, pansy, nemesia, bacopa, verbena, vinca, and dahlia are inefficient in taking up iron (Fe) at high pH. The optimal substrate pH value for these crops is between 5.8 and 6.2. At substrate pH values above this range, iron and other…

Tackling the puzzle of downy mildew & botrytis management in roses

To the typical farmer, the onset of rains signifies a new crop season, while for the rose grower, seasonality is primarily market-driven. Rainfall is also necessary to replenish the much-required water sources like rivers, lakes and other reservoirs. Despite the good fortunes that come with the rains,…

"This product is a great tool in the fight against botrytis"

This past fall and winter produced great conditions for the development of botrytis on greenhouse crops. Based on information from OHP and others, and an application last spring, Jim Stepp, production manager at Van Wingerden International, decided to apply Astun Ornamental Fungicide to more crops. “We…

Videos: How to use biological crop protection

The popularity of Koppert Biological Systems’ ‘how-to-use’ videos which visually illustrate how each product is applied to solve a problem in the greenhouse or field, has motivated the company to produce more than 45 product instruction videos. The ‘how-to’ videos can be found on YouTube.…

Hortival Diffusion, France, on shading products Sudlac

"It helps our plants to thrive"

With 300 hectares and more than 250 employees, Hortival Diffusion (Minier nursery) is one of France’s biggest nurseries and one of the top 10 European nurseries. For 180 years, the family-owned company steadily expanded until it was bought out in 1997 by the French group Terrena. The company is known to the general public for…

New Zealand: Where myrtle rust has been found

Myrtle rust continues to be an issue in New Zealand. 988 infected properties have been reported since May 2017. Northland - There are 41 sites/properties in Northland with confirmed infection. Most of these are in Kerikeri. Taranaki - There are 288 sites/properties in Taranaki with confirmed infection.…

One-stop-shop for Vine Weevil control in the UK

The launch of ICL’s new Seeka range of beneficial nematodes in the UK is the catalyst behind the company’s new one-stop-shop for Black Vine Weevil control - offering a programmed IPM approach to controlling this potentially devastating pest. Supplementing ICL’s conventional chemical pesticides range,…

"40% more predatory mites compared to regular sachets"

Biobest’s Swirskii-Long-Life-System has just got an upgrade due to its improved sachet formulation. The number of predatory Amblyseius (Typholodromips) swirskii mites per Long-Life sachet has been boosted from 150 to 250. “Widely used as a key beneficial in sweet pepper, cucumber, aubergine, strawberry…

Judge finds ex-employee not responsible

Grower holds ex-employee accountable for an unsellable harvest after three years

Knowingly spraying with unchecked pesticides right before harvest, leading to the entire berry harvest becoming unsellable which resulted in over 75,000 euros in damages. This…

South Africa: Research hailed as a “game changer” for pincushion flower industry

The overseas flower market pays a premium for long-stemmed pincushions without any curvature, insects or signs of disease. To deliver such flowers are easier said than done. Depending on the cultivar, South African fynbos farmers are currently only able to export between 40% and 80% of the local harvest.…

UK: New products enable growers to protect £1bn crops

UK growers now have access to three new products, to target and control ‘Grey Mould and Powdery Mildew’ in ornamentals, and stop aphid attack on peppers and chilli. The development was made as a result of two interrelated AHDB programmes representing an investment of £3.35 million over four years to…

US: Efficacy of biochemical biopesticides that may be used in organic farming

This article summarizes publicly available data on efficacy of commercially available, EPA-registered biochemical biopesticides for plant disease control. For a more detailed introduction see the related eOrganic article Biopesticides for Plant Disease Management in Organic Farming . At the time of…

October 29-30, Ajaccio

Second European conference on Xylella fastidiosa: how research can support solutions

The ‘Second European conference on Xylella fastidiosa: how research can support solutions’ will take place in Ajaccio (Corsica, FR) from the 29th to the 30th of October 2019. The conference is being organised jointly by: EFSA, INRA, ANSES, the ‘Office de l’Environnement de la Corse’ and the…

Canada: Versys Insecticide (afidopyropen) registered for greenhouse and outdoor ornamentals

Flowers Canada Growers announces that the product Versys Insecticide (afidopyropen) is now registered for greenhouse and outdoor ornamental uses. Versys is effective against multiple species of Aphids and Whiteflies. FCG would like to thank BASF Canada for their ongoing support of the ornamental industry…

US: New insecticide to combat increasing pest pressures

BASF’s newest insecticide for the ornamentals market, Ventigra insecticide, is now available. It will be a resistance management tool for nursery and greenhouse growers, providing precision-targeted pest management of piercing-sucking insects like whiteflies, aphids, mealybugs and scales. “Today’s…

Australia: Home gardeners commended for returning pest plant, but more returns needed

Home gardeners in Western Australia are commended for heeding a call to help prevent the establishment of a decorative declared plant mistakenly sold in WA over summer, but more are encouraged to do the right thing. Callisia repens (Jacq.) L. is an herbaceous perennial succulent, also known as creeping…

Preventing Tobacco Mosaic Virus infection

Tobacco Mosaic Virus (TMV) outbreaks are frequently blamed on the shipment of infected plugs or cuttings into area greenhouses. While this may be accurate in some cases, there are many more instances of localized TMV outbreaks that can be linked to our employees and growing practices. by Tom Ford -…

US: OHP adds Kalmor Fungicide/Bactericide to its biosolutions

OHP has added Kalmor Fungicide/Bactericide to its line of biosolutions for ornamental growers. Available through authorized OHP distributors, Kalmor is an OMRI-listed, copper hydroxide-based fungicide that is labelled for use on a range of vegetables and herbs grown in greenhouses, shadehouses, and…

US: Thrips on spring crops

In the past week thrips were observed on several crops including spikes ( Dracaena ), Vinca, tomato and chrysanthemum. by Angela Madeiras and Jason Lanier Monitoring for thrips begins with the arrival of cuttings, as most thrips infestations start with insects that come in on plugs and cuttings. A sound dipping program,…

Pericallis: Leaf mottling and necrosis

While visiting a grower, mottling and necrotic leaf spotting was observed on a few scattered plants. This is a typical symptom of a virus infection. A series of photos provided by this Alert will aid you in identifying this tomato spotted wilt virus (TSWV) infection. by Brian E. Whipker (…

US: New York joins list of states to receive supplemental label for spotted lanternfly control

Safari 20 SG Insecticide has received a 24(c) label for the control of spotted lanternfly in New York. This follows 2ee label approval to control spotted lanternfly in 15…

Adama-STK distribution agreement brings fungicides to Colombia

Crop protection company Adama and STK bio-ag technologies have signed an exclusive agreement for the distribution of Timorex Gold botanical-based bio-fungicide and STK Regev ‘Hybrid’ fungicide throughout Colombia. In Colombia, Timorex Gold is approved for the following crops: Bananas, Rice, Ornamentals,…

New Zealand: Online training programme launched to help public identify myrtle rust

Biosecurity New Zealand (part of the Ministry for Primary Industries) and the Department of Conservation (DOC) have launched an online training programme to help New Zealanders identify suspected myrtle rust infections in their backyards. The plant fungus can be hard to identify without training and can…

Australia: Diagnosing unusual or rare plant pests

An estimated 40 per cent of global food crops are lost every year due to plant pests and disease, equating to around US$220 billion annually and invasive insects US$70…

Box tree moth findings confirmed in Canada

The Canadian Food Inspection Agency (CFIA) confirmed that box tree moth (BTM) was found in three separate residential landscapes in Etobicoke, Ontario, a Toronto neighborhood in fall 2018. CFIA plans to assess the extent of spread and determine whether this is a transient, or not fully established, pest…

Federico Martínez Martínez, Plántulas de Tetela:

"No risks for employees or for the environment"

Doing the right things in order to build a solid reputation, even if the buyers don't follow the same path yet: that is the philosophy on which Plántulas de Tetela bases its investment in biological crop protection. The Mexican producer of propagation materials for the ornamentals sector has reduced its…

US: Pesticide Registration Improvement Act signed into law

U.S. Senate Committee on Agriculture, Nutrition, and Forestry Chairman Pat Roberts, R-Kan., and Ranking Member Debbie Stabenow, D-Mich., said President Trump signed the…

Netherlands: NWO-TTW grant for biological control research of thrips pests in ornamental crops

Pesticides often have negative environmental side effects, and there is therefore an increasing demand for alternative, environmental-friendly methods such as biological control. A project led by IBED researcher Arne Janssen has been granted funding from the Open Technology Programme of NWO Applied and…

Canada: Posterity Fungicide now available for greenhouse and outdoor ornamentals

Flowers Canada Growers announces that Posterity Fungicide (pydiflumetofen) is now available for greenhouse and outdoor ornamental uses - including cut flowers. Posterity…

Pansy: Lower leaf purplish-black spotting

Pansies (Viola×wittrockiana) are a major spring and fall bedding plant crop with millions of plants grown for the North American market. On a recent visit to a greenhouse, purplish-black spotting on the lower leaves was observed (Fig. 1). In severe cases, the entire leaf exhibited dense darker regions…

Dutch grower-propagator opts for residue-free solutions

When insecticides for combatting thrips no longer worked, plant cultivation and propagation company Damsigt considered discontinuing their most successful variety - Calathea zebrina. Fortunately, the combination of predatory mite Amblyseius swirskii with Nutrimite feed brought results. “Thrips is now…

new Nanobubble generator used at Revol Greens

"Managing Pythium in water while promoting plant growth"

Moleaer expands its innovative product line with the new Bloom nanobubble generator. The patent-pending Bloom, designed specifically for horticulture, unlocks the full potential of oxygen to improve crop production. The Bloom produces trillions of charged nanobubbles, ~80nm in size, dissolving oxygen…

New biostimulant combats transplanting stress

A new biostimulant that helps young plants to recover from the stresses of transplanting has been launched by Arysta LifeScience UK & Ireland. Goteo is applied by drip irrigation or drench to horticultural seedling plugs and young plants, to improve overall health status and the ability to overcome…

Limonene in marigolds repels tomato whiteflies

Researchers at Newcastle University have published a study in PLOS ONE, showing that limonene is the component of marigolds that repels tomato whiteflies. The research team says it could be possible to develop a limonene product that could be hung in greenhouses to deter whiteflies. Study leader Dr.…

Webinar series on ornamental disease control starts March 14

Rankled by root rots? Mystified by mildews? Bothered by Botrytis? Greenhouse Canada Magazine and OMAFRA are co-hosting a webinar series on ornamental disease control. Running from March to late April, this series covers topics from sanitation measures you should be adding to your management program, to…

Zimbabwean authorities approve range of ICM products from Dudutech

After a rigorous registration process, Phil Weller, the official distributor of Dudutech products in Zimbabwe, has received the official rubber stamp on a range of pest and crop management solutions. Among the products now available to farmers in Zimbabwe are Mytech, Trichotech, Lecatech and Beauvitech,…

US: Safari 20 SG Insecticide receives 2ee label to combat spotted lanternfly in 16 states

Nufarm Americas announced that Safari 20 SG Insecticide has received a 2ee label for the control of spotted lanternfly in 16 states. Label recommendations include Connecticut, Delaware, Kentucky, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, North Carolina, Pennsylvania, Rhode…

Mealybugs, root aphids, spotted lanternfly: Just a normal week

Several years ago I read this in an article by the estimable Dr. Casey Sclar, formerly Plant Health Care Leader at Longwood Gardens and now with APGA, in the April 2008 Greenhouse Product News (see references), reporting on some of his research (my highlights): “We found that female [citrus] mealybugs…

Concise now registered in Canada

Proven PGR option now available to Canadian growers

Growers in Canada now have a proven plant growth regulator (PGR) to add to their plant quality strategy. Concise is now registered for use in Canada. “This registration opens…

Symptoms and consequences of chilling or freezing injury on greenhouse crops

With the recent polar vortex, some growers have seen symptoms of chilling and freezing injury on their greenhouse crops. Other growers are looking ahead to spring and are pondering the idea of finishing some of their crops outdoors to free up greenhouse space. In either of these situations, which crops…

US: National Pollinator Garden Network surpasses one million registered gardens

In just three years, 1,040,000 gardens were registered with the Million Pollinator Garden Challenge (MPGC) involving an estimated eight million people, concentrated in the United States, and Canada with some in Mexico, and across the globe. From tiny yards to public gardens, the million plus gardens add…

New Zealand: Isolated sightings of Brown Marmorated Stink Bug

There have been several sightings of Brown Marmorated Stink Bug (BMSB) around New Zealand this summer. While this is alarming, there is no evidence of an established…

Bram Tijmons, PATS

Drones knock out insects fully automatic

A novel and a futuristic way to combat moths and other insects is by the use of drones. Start-up PATS developed these mini-drones. Bram Tijmons: "The demand for organic products is increasing, while the regulations for using insecticides are becoming more strict. This requires a sustainable way of…

March 1, Vineland

CAN (ON): Learn how to recognize important greenhouse pest species

At the 1 day workshop on “Greenhouse IPM: Achieving Sustainable Biocontrol”, held on March 1 in Vineland, you can learn how to recognize important greenhouse pest species and discuss the benefits of sprays versus bios. This workshop will cover common pests like whitefly (pictured), aphids, thrips and…

Canada: Talus approved for greenhouse ornamental uses

Flowers Canada Growers announced that Talus Insect Growth Regulator (buprofezin) has been approved for use on greenhouse ornamentals (excluding cut flowers) against…

Insect netting discussed on first edition of Plant2019

Today in Valencia it's all about Plant, Cellular and Molecular biology. The first edition of the Plant2019 kicked off this morning. The conference wants to offer an international platform for botanists, academic scientists, young inspired researchers and research scholars to share their experiences and…

"Now is the time for Configure applications to your herbaceous perennial liners"

As those liners get rooted in or the liner trays start arriving, it’s time to start planning your Configure applications. Here are just a few examples of results we have seen with herbaceous perennials along with guidelines for application under your own growing conditions. Although these examples show…

"Watch for Botrytis blight"

Overcast, wet weather can increase Botrytis risk in greenhouse crops. Botrytis blight or “gray mold” is a damaging disease to floriculture and edible crops, particularly during the winter months. The pathogen thrives in low light, moist, and humid conditions. It is best controlled by managing the greenhouse environment, keeping…

Plant sightings: Highlights of greenhouse scouting

One aspect of Brian Whipker's job as a Floriculture Extension Specialist is visiting growers. "It is always wonderful to get out of the university ivory tower and see what is occurring in greenhouses. I do not do this as much as I desire or should. On these trips there are always amazing discoveries.…

UK: Researchers rally against Xylella fastidiosa

A major research programme focussing on building UK resilience to the bacterial plant pathogen Xylella fastidiosa, met for the first time this week. Dr Gerard Clover took up the post as Impact and Engagement Manager based at the John Innes Centre for the BRIGIT consortium. Dr Clover will be responsible…

February 26, Kenilworth

UK: Improving the performance of biopesticides in the production of ornamental crops

Join the AHDB and a range of other crop protection specialists at the Ornamentals Conference focusing on the use of biopesticides in the production of ornamental crops. The one-day event will provide insight into biopesticides and the AMBER project (Application and Management of Biopesticides for…

New biostimulant solutions for floral crops

There is a huge boom in the cultivation of ornamentals worldwide, with annual increases in production that normally exceed the forecasts. The Valentine's Day and Mother's Day seasons account for 25% of the total annual export volume; one quarter of the total exported by entrepreneurs in the sector in…

Australia: Putting a price on pest management

Looking at the ‘return on investment’ for production nurseries that implement a structured and effective pest management and monitoring program is the key focus of a new levy funded project. Known as ‘Improving Pest Management’ (NY17009) the project is funded by Hort Innovation using nursery industry…

SePRO secures private equity investment

Bill Culpepper, President & CEO of SePRO Corporation announced that Excellere Partners, a private equity firm focused on partnering with entrepreneurs and management…

UK: Plant health inspection facilities at place of first arrival if there's no Brexit deal

A recently updated guide from the UK Government details how facilities for plant health controlled commodities imported into England and Wales from non-EU countries via roll on roll off terminals can get designation if the UK leaves the EU with no deal. The guide explains: how to request approval for…

The Usual Suspects: spring pests

With spring crops comes some familiar spring pests. The following notes may help avoid being shocked by unwelcome infestations later on. by Dan Gilrein - dog1@cornell.edu Broad mite This very tiny pest causes big damage, such as odd stunting, bronzing and distortion of new growth, often surprising growers who report it…

Vegetal-derived biostimulant enhances adventitious rooting in cuttings

Plant-derived protein biostimulants exhibit hormone-like activities promoting plant growth and yield, yet detailed investigations on hormonal function have remained limited. A…

UK: Maintaining successful control of downy mildew in protected crops of cut flower column stocks

A new AHDB factsheet explores Downey Mildew in protected crops of cut flower column stocks. Column stocks are currently the main non-bulb, protected cut flower crop grown in the UK. The factsheet comprises of: Disease development and symptoms Sensitivity testing Disease control strategies Crop management…

Biocontrol Profile: Mighty Mites, Part II

Several predatory mite species are available as biological control agents (BCAs) for common greenhouse pests. Some of the more common species are described below. Neoseiulus cucumeris Formerly Amblyseius cucumeris, this generalist predator will eat thrips 1st instar nymphs, whitefly, aphids, and…

Australia’s most threatening plant disease targeted

Australia will be better prepared for plant disease outbreaks with the appointment of a national coordinator to lead a three-year program to improve readiness for the potential incursion of the devastating Xylella fastidiosa. Experienced biosecurity and emergency response coordinator, Craig Elliott, has…

Australia: A free electronic pest identification tool

Quick identification of plant pests, diseases, disorders, weeds and beneficials is vital to maintaining a profitable production nursery operating under an effective crop protection program. Over the years several variations of reference books and field guides have been used to identify plant pests and…

Australia: Brown marmorated stink bug found in Port Melbourne

The brown marmorated stink bug (BMSB) has been detected in Port Melbourne. The bug was found in an Agriculture Victoria trap which was put out as a precaution after Victoria’s first BMSB detection in Clayton in December. Victoria’s Chief Plant Health Officer, Dr Rosa Crnov, said Agriculture Victoria had…

Australia: New minor use permit

Cormoran Insecticide, containing the active ingredients acetamiprid and novaluron (PER86931), is now able for use on NURSERY STOCK (NON-FOOD) seedlings, tubes & plugs, potted colour, trees and…

US (GA): Beneficial insects can prove useful for greenhouse crops

While the use of beneficial insects and other biocontrols for agricultural pest management hasn’t gained widespread usage in open field production, some Georgia farmers are using natural control methods in greenhouse and high-tunnel production. “The makeup of our farms and the perceptions of our farmers…

Powdery mildew on roses

Powdery mildew is one of the most prevalent and common diseases of roses caused by the fungus sphaerotheca pannosa var.rosae, This results in the production of white powdery fungal growth over the…

Putting biosecurity at the heart of the horticultural trade

The new Plant Healthy website provides a self-assessment tool for horticulture businesses and organisations to improve the biosecurity of sourcing systems and advance plant…

Australia: Biosecurity advice - Brown marmorated stink bug

The NGIA published an updated biosecurity alert for Brown Marmorated Stink Bug (BSMB) which has been detected recently in QLD, WA and VIC. BSMB is a significant exotic plant pest which is yet to establish in Australia. The 2017-18 season saw an increase in BMSB detections, and this trend has continued.…

Kenya: Scorecard measures nutrient pollution in Lake Naivasha

Economic activity in and around Lake Naivasha, and the rapidly growing population, have placed mounting environmental pressure on this important source of freshwater in central southern Kenya. The lake provides an income for local fisherfolk, supports a vast array of flora and fauna, including waterbuck,…


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